Improvement in furnaces



B. D. EVANS.

Evaporating Pan.

Patented Mar. 20. 1860.

SIN

Witnesses.

Inventor,

AM. PHUTOLITHO.CU.N.Y, (DSEGRNES PRQCESS.)

i IINTTED STATES PATENT Ormea.

BENJAMIN D. EVANS, OF MOUNT VERNON, OHIO.

IMPROVEMENT IIN FURNACES.

Specification forming part of Letters Patent No. 27,54lli. dated Mai-h 20, 1860.

To MZ whom t may concern:

Bc it known that I, B. D. EvANs, of Mount Vernon, in the county of Knox and State of Ohio, have invented a new and useful Oombination of an EvaporatingFurnace and Fariners Boiling Apparatus; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making a part of this specification, in which- Figure l is a side sectional view of my invention, taken in the line x x, Fig. 4; Fig. 2, a detached side sectional View of a portion of the same, taken in the line .fr x; Fig. 3, a transverse vertical section of the same, taken in the line g/ y, Fig. 4; Fig. 4, a horizontal section of the whole device, taken in the line .e z, Fig. l.

The object'ofA this invention is to obtain a 'very simple furnace that will be capable of being used as a boiler and evaporator in the manufacture of sugar, and for other purposes, one that may be adapted to operations on a large or small scale, and well arranged for the controlling of the heat and the ready manipulation of the parts for that end.

To enable those skilled in the art tofully understand and construct my invention, I will proceed to describe it.

A represents a cast-iron furnace, which is of rectangular form, provided with an ordinary grate, a, at its bottom, underneath which a sliding grate, B, is placed, the latter serving as a register by which the admission of air into the furnace A may be controlled as desired. At each side of the furnace A, atits upper part, there is a cold-air passage, Z1, and these passages com mnnicate with the external air by means of openings c, which are clearly shown in Fig. 4. In the back part of the furnace A a slide, d, is placed, which may be removed from and fitted in the furnace at pleasure. The top plate, c, of the furnace is also removable at pleasure, and at its back part a boiler, B is placed, through which the smokepipe C passes, as shown clearly in Figs. l and 2. This boiler B is also removable, the lower section of the smoke-pipe G being attached to it.

The above described parts are complete within themselves, and form a furnace which may be used. for all ordinary purposes, aswell as for boiling and evaporating sirups ou a small scale for family use.

D represents a sheet-metal attachment, which and furnace, as shown clearly in Figs. 3 and 4. In the lower part of the attachment D there is a flue, E, the front part of which is provided with a damper, j. The central chamber, f, of the attachment D is alsoprovided with a damper, F, which, when closed, shuts oft the chamber f from the furnace A. The back part of the attachment D is provided with a support, lr, and is also provided with a top plate, Z, at its back part, with an aperture, m, to receive the boiler B. Vhen the attachment D is used, the top plate, e, of the furnace A is removed, as is also the slide d, and a top plate, G, is placed on the furnace A and its attachment D. By opening the damper F the products of combustion pass directly through both the furnace and the chamber f, and the evaporating-pans being placed on the plate G, the boiling and evaporating process is gone through with, heat being controlled by regulating the register B. The plate G is designed to be used when operations are y,conducted on a small scale.

In operating on a large scale the vessels may t directly on the furnace and its attachment, the bottoms of thevessels forming the top and extending over the cold-air passages b g. In this latter case the cold-air passages b g perform an important function-they keep the sides of the vessel cool, and thereby cause the scum to be drawn at the sides of the vessels, from whence it can be readily removed.

Having thus described my invention, what I claim as new, and desire to secure by Letl ters Patent, is-

l. The combination of the furnace A, am1 and its attachment D, provided with the cold.

zontally through the sides of the attachment ail' chambers b g, and arranged to operate as the furnace Abeing readily detached and used and for the purpose set forth. separately.

2. The combination of the reoister B furnace A, attachment D, Cold-air hambefs Z) g, BENJAMIN D EVANS' Hue E, dainpers j F, and boiler B, When ai- Witnesses: ranged as shown, so that the above-named STILns W. BURR,

parts may be used jointly, and also admitof HENRY I?. VARDEN. 

